"In 1998, I lost my reputation and my dignity. I lost almost everything," she said. "I almost lost my life."

The 2010 suicide of Rutgers University student Tyler Clementi, who killed himself after his roommate posted footage of him with another man, was a turning point for her, Lewinsky said.

Talking about Clementi with her mother, Lewinsky was taken aback at how strong her mom's reaction was.

"She was beside herself … gutted with pain. [Then I realized] she was reliving 1998, reliving a time when she sat by my bed every night, made me shower with the bathroom door open — a time when my parents thought I would be humiliated to death. Literally."

Stop public shaming

The growing culture of public shaming online and through social media has meant there is no perimeter to what Lewinsky termed the "echo of embarrassment" felt by those at the centre of whatever scandal takes hold in the public imagination.

"A marketplace has emerged where public humiliation is a commodity and shame is an industry," she said. "How is the money made? Clicks. The more shame, the more clicks; the more clicks, the more advertising dollars.… We are in a dangerous cycle: the more we click on this kind of gossip, the more numb we get to the human lives behind it. And the more numb we get, the more we click."

Lewinsky said what is needed is a "cultural revolution: public shaming as a blood sport needs to stop."

She called for empathy and compassion in the face of cyberbullying and public shaming, asking people to become "upstanders" willing to post a positive comment of support, or report online bullies when they see them.